I think they're all right - but I am biased! Bottom line is you need to remember formulae, methods, proofs, definitions and bookwork. Not really any bookwork for CT3 - so just the first four. Flashcards do this in one of the most efficient ways to achieve this. Then it's stacks of exam paper practice. Could use the formulae summary sheets to test yourself and then just practise the proofs yourself and make sure you can remember the methods for going about estimation, CI an hypothesis tests.
